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CVE-2026-29000

Estado: AplazadaCrítica (9.3)—

pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attackers to forge authentication tokens. Attackers who possess the server's RSA public key can create a JWE-wrapped PlainJWT with arbitrary subject and role claims, bypassing signature verification to authenticate as any user including administrators.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de autenticación remota (AV:N, PR:N, UI:N) en servicio web pac4j-jwt que permite falsificar tokens JWT y asumir identidad de usuarios administrativos sin credenciales válidas.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningPrivileged Account ManagementPassword PoliciesNetwork SegmentationMulti-factor AuthenticationLimit Access to Resource Over Network

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Pac4j — Pac4j-jwtAI

CWE

Referencias

JSON original (NVD)

Mostrar
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          "options": [
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  "published": "2026-03-04T22:16:18.783",
  "references": [
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      "url": "https://www.codeant.ai/security-research/pac4j-jwt-authentication-bypass-public-key",
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    }
  ],
  "lastModified": "2026-07-14T19:16:54.700",
  "sourceIdentifier": "disclosure@vulncheck.com"
}